1989 Nissan D21 truck loses power

[BikerBeck]

Please help , I have a 1989 Nissan D21 with 100,000 miles on it that just started losing power when I start off in 1st gear like I put in the clutch, I try to get up speed and it just trys to die, but will idle, not cut off.I have replaced the fuel filter, fuel pump, spark plugs, wires, PVC plug checked all of the vacuum hoses, unhooked the cat. converter to see if it was bad, but it's still doing the same thing. I siphoned all the gas out and put new gas in it ..Still the same thing. Any sugestions would be appreciated, I'm at my wits end and money to.....Oh by the way just idling it is very rough. Thanks to anyone that can give me somewhere else to look and I will....I love my truck because of the gas mileage...

[MaximA32]

I would check the IAC/V. It's probably not working properly.